So, for those who hesitate to check out lmtx, here is some information.

- In order to achieve long term stability context will use a lean and mean variant of luatex (although for now context will keep running on luatex too; i might drop support for luajittex). Eventually the source code will be part of the context distribution so that one can always compile a binary that matches an archived context version.

- This version also permits us to experiment (even very extreme) without interupting the parent program luatex, which is now used by other macro packages too and therefore needs to be frozen in functionality. Some features might trickle back into luatex eventually (unless it breaks compatibility).

- As a direct effect it means that context does a bit more: creating the pdf file (already most is done anyway in mkiv), dealing with font embedding, handling image inclusion, etc. For sure there can be issues with that but it has run on my machine already for quite a while.

- It is hard to be conclusive about performance but for instance the luatex manual processes a bit faster with lmtx as does the test suite. A gain in performance on very demanding documents is also observed by Alan and Thomas. Normally one can expect a similar performance. However, the memory footprint could be a bit smaller.

- The current somewhat hybrid codebase of context will stepwise be adapted so that at some point we can start experimenting with some pending ideas. (Which is why i sometimes answer "later this year".)

Anyway, it might not look like it, but it is a conceptual change in how context evolves.


                                          Hans Hagen | PRAGMA ADE
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